debugging elasticsearch

1
votes

I'm using tire and elasticsearch. The service has started using port 9200. However, it was returning 2 errors:

"org.elasticsearch.search.SearchParseException: [countries][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"query":{"query_string":{"query":"name:"}}}]]"

and

"Caused by: org.apache.lucene.queryParser.ParseException: Cannot parse 'name:': Encountered "<EOF>" at line 1, column 5."

So, I reinstalled elasticsearch and the service container. Service starts fine.

Now, when I search using tire I get no results when results should appear and I don't receive any error messages.

Does anybody have any idea how I might find out what is wrong, let alone fix it?

1
elasticsearch
Did you reindex the data after reinstalling ? – skaffman

1 Answers

11
votes

first of all, you don't need to reindex anything, in the usual cases. It depends how you installed and configured elasticsearch, but when you install and upgrade eg. with Homebrew, the data are persisted safely.

Second, no need to reinstall anything. The error you're seeing means just what it says on the tin: SearchParseException, ie. your query is invalid:

{"query":{"query_string":{"query":"name:"}}}

Notice that you didn't pass any query string for the name qualifier. You have to pass something, eg:

{"query":{"query_string":{"query":"name:foo"}}}

or, in Ruby terms:

Tire.index('test') { query { string "name:hey" } }

See this update to the Railscasts episode on Tire for an example how to catch errors due to incorrect Lucene queries.